Limonene, the compound in essential oil of nutmeg displayed antioxidant effect in sunflower oil during the deep‐frying of Chinese Maye

The deep-frying process for plenty of fried products using vegetable oils needs safe and effective antioxidants. In the present exploration, the nutmeg essential oil (NEO) was employed as a potential antioxidant for sunflower oil during the deep-frying of Chinese Maye at 180 degrees C for 30 hr. In the comparative study, the additions for NEO at 0.12 g/kg, TBHQ at 0.12 g/kg, BHA at 0.08 g/kg, and BHT at 0.08 g/kg to sunflower oil were able to obviously improve its oxidative stability during the deep-frying process, and their antioxidant effects were in the relative order: TBHQ at 0.12 g/kg > NEO at 0.12 g/kg > BHA at 0.08 g/kg > BHT at 0.08 g/kg (p < .05). Besides, NEO at 0.12 g/kg could markedly ameliorate the sensory properties including flavor, taste, crispness, and overall acceptability of the fried products, Chinese Maye (p < .05 or p < .01). In addition, using antioxidant activity-guided fractionation, three active compounds including limonene, terpinolene, and geranyl acetate were isolated from NEO. Among them, limonene was demonstrated to not only significantly increase the oxidative stability of sunflower oil in the deep-frying process, but also significantly increase the sensory properties of the fried products, Chinese Maye (p < .05 or p < .01). Consequently, limonene could be employed as antioxidants in sunflower oil for the deep-frying of Chinese Maye, and the sunflower oil flavored by NEO could be used as frying oils for its oxidative stability and unique flavor.